Suche senden
Hochladen
lathe
•
Als PPT, PDF herunterladen
•
13 gefällt mir
•
7,320 views
abubacker siddiq
Folgen
Bildung
Melden
Teilen
Melden
Teilen
1 von 74
Jetzt herunterladen
Empfohlen
G code and M code
G code and M code
saqibmuneer5
SHEET METAL PROCESS
SHEET METAL PROCESS
Raja P
Poly jet ppt
Poly jet ppt
Pallavi Brahmankar
Chemical machining
Chemical machining
Cherukuri Surinarayana
12 cnc & part programming
12 cnc & part programming
M Siva Kumar
Abrasive jet machining
Abrasive jet machining
Arjun Patial
Die & mould maker profile 1
Die & mould maker profile 1
Maxpromotion
Theory of metal cutting
Theory of metal cutting
Muhammad Muddassir
Empfohlen
G code and M code
G code and M code
saqibmuneer5
SHEET METAL PROCESS
SHEET METAL PROCESS
Raja P
Poly jet ppt
Poly jet ppt
Pallavi Brahmankar
Chemical machining
Chemical machining
Cherukuri Surinarayana
12 cnc & part programming
12 cnc & part programming
M Siva Kumar
Abrasive jet machining
Abrasive jet machining
Arjun Patial
Die & mould maker profile 1
Die & mould maker profile 1
Maxpromotion
Theory of metal cutting
Theory of metal cutting
Muhammad Muddassir
Chemical machining
Chemical machining
Rania Elrifai
Forging
Forging
Bilalwahla
Single Point Cutting Tools
Single Point Cutting Tools
GIRISH SURVE
Solutions for machine design by KHURMI and GUPTA
Solutions for machine design by KHURMI and GUPTA
Azlan
Design of compound die
Design of compound die
KRISHNA MISHRA
Power press
Power press
kanwaldeep singh
Abrasive flow machining (afm)
Abrasive flow machining (afm)
sagar agarwal
Casting process
Casting process
Kiran Wakchaure
Milling cutter
Milling cutter
Albert Candor
Machining operations and machine tools
Machining operations and machine tools
Muhammad Muddassir
Mfg tooling 04 cutting tool design
Mfg tooling 04 cutting tool design
Nageswara Rao Posinasetti
Design for Manufacturing Guidelines, issue IV, Milling Design Guidelines
Design for Manufacturing Guidelines, issue IV, Milling Design Guidelines
DFMPro
Milling machine.pptx
Milling machine.pptx
AliRaza1767
Dies Design - Cutting Operations Part 2
Dies Design - Cutting Operations Part 2
Federick Pocoyo
final project
final project
Rohit kumar vidyarthi
Theory of-metal-cutting
Theory of-metal-cutting
Gaurav Gunjan
Pattern allowances in metal casting
Pattern allowances in metal casting
Andrés Escárraga
Cutting tools
Cutting tools
University of engineering and technology taxila
Ultrasonic Machining (USM)
Ultrasonic Machining (USM)
Amlan Talukdar
Electrochemical Machining
Electrochemical Machining
Sushima Keisham
Special purposer lathe machine. ppt
Special purposer lathe machine. ppt
ZAKI ANWER
5 lathe & drill
5 lathe & drill
Devendra Hembade
Weitere ähnliche Inhalte
Was ist angesagt?
Chemical machining
Chemical machining
Rania Elrifai
Forging
Forging
Bilalwahla
Single Point Cutting Tools
Single Point Cutting Tools
GIRISH SURVE
Solutions for machine design by KHURMI and GUPTA
Solutions for machine design by KHURMI and GUPTA
Azlan
Design of compound die
Design of compound die
KRISHNA MISHRA
Power press
Power press
kanwaldeep singh
Abrasive flow machining (afm)
Abrasive flow machining (afm)
sagar agarwal
Casting process
Casting process
Kiran Wakchaure
Milling cutter
Milling cutter
Albert Candor
Machining operations and machine tools
Machining operations and machine tools
Muhammad Muddassir
Mfg tooling 04 cutting tool design
Mfg tooling 04 cutting tool design
Nageswara Rao Posinasetti
Design for Manufacturing Guidelines, issue IV, Milling Design Guidelines
Design for Manufacturing Guidelines, issue IV, Milling Design Guidelines
DFMPro
Milling machine.pptx
Milling machine.pptx
AliRaza1767
Dies Design - Cutting Operations Part 2
Dies Design - Cutting Operations Part 2
Federick Pocoyo
final project
final project
Rohit kumar vidyarthi
Theory of-metal-cutting
Theory of-metal-cutting
Gaurav Gunjan
Pattern allowances in metal casting
Pattern allowances in metal casting
Andrés Escárraga
Cutting tools
Cutting tools
University of engineering and technology taxila
Ultrasonic Machining (USM)
Ultrasonic Machining (USM)
Amlan Talukdar
Electrochemical Machining
Electrochemical Machining
Sushima Keisham
Was ist angesagt?
(20)
Chemical machining
Chemical machining
Forging
Forging
Single Point Cutting Tools
Single Point Cutting Tools
Solutions for machine design by KHURMI and GUPTA
Solutions for machine design by KHURMI and GUPTA
Design of compound die
Design of compound die
Power press
Power press
Abrasive flow machining (afm)
Abrasive flow machining (afm)
Casting process
Casting process
Milling cutter
Milling cutter
Machining operations and machine tools
Machining operations and machine tools
Mfg tooling 04 cutting tool design
Mfg tooling 04 cutting tool design
Design for Manufacturing Guidelines, issue IV, Milling Design Guidelines
Design for Manufacturing Guidelines, issue IV, Milling Design Guidelines
Milling machine.pptx
Milling machine.pptx
Dies Design - Cutting Operations Part 2
Dies Design - Cutting Operations Part 2
final project
final project
Theory of-metal-cutting
Theory of-metal-cutting
Pattern allowances in metal casting
Pattern allowances in metal casting
Cutting tools
Cutting tools
Ultrasonic Machining (USM)
Ultrasonic Machining (USM)
Electrochemical Machining
Electrochemical Machining
Andere mochten auch
Special purposer lathe machine. ppt
Special purposer lathe machine. ppt
ZAKI ANWER
5 lathe & drill
5 lathe & drill
Devendra Hembade
Lathe machine tool
Lathe machine tool
Manish Singh
Lathe machine
Lathe machine
Raju D
Yarn calculations-130804183138-phpapp02
Yarn calculations-130804183138-phpapp02
Md Rakibuzzaman
Experimental study of Effect of Cutting Parameters on Cutting Force in Turnin...
Experimental study of Effect of Cutting Parameters on Cutting Force in Turnin...
AM Publications
Pp jig
Pp jig
Sidiq Mohamad
Tool Materials
Tool Materials
mrg timoq
lathe cutting tools
lathe cutting tools
lokesh bhatta
Machining
Machining
Gulfam Hussain
cutting speed
cutting speed
Mohamad Fairuz
Learning Salät (Namaz)
Learning Salät (Namaz)
muzaffertahir9
Cnc પ્રોગ્રામિંગ
Cnc પ્રોગ્રામિંગ
Janak Valaki (PhD)
Fikus presentation 2015
Fikus presentation 2015
Manuel Torrijos
Profile mua thi Kenhtuyensinh
Profile mua thi Kenhtuyensinh
kenhtuyensinh
Mechanics of metal cutting
Mechanics of metal cutting
Kumar Chirra
Basic of thermodynamics section a
Basic of thermodynamics section a
Akshit Kohli
cutting tool materials
cutting tool materials
Pravin8083
Workshop practice lab 1
Workshop practice lab 1
Shakeel Akram
Screw Recommendations for Specific Resins and Processes
Screw Recommendations for Specific Resins and Processes
R&B Plastics Machinery
Andere mochten auch
(20)
Special purposer lathe machine. ppt
Special purposer lathe machine. ppt
5 lathe & drill
5 lathe & drill
Lathe machine tool
Lathe machine tool
Lathe machine
Lathe machine
Yarn calculations-130804183138-phpapp02
Yarn calculations-130804183138-phpapp02
Experimental study of Effect of Cutting Parameters on Cutting Force in Turnin...
Experimental study of Effect of Cutting Parameters on Cutting Force in Turnin...
Pp jig
Pp jig
Tool Materials
Tool Materials
lathe cutting tools
lathe cutting tools
Machining
Machining
cutting speed
cutting speed
Learning Salät (Namaz)
Learning Salät (Namaz)
Cnc પ્રોગ્રામિંગ
Cnc પ્રોગ્રામિંગ
Fikus presentation 2015
Fikus presentation 2015
Profile mua thi Kenhtuyensinh
Profile mua thi Kenhtuyensinh
Mechanics of metal cutting
Mechanics of metal cutting
Basic of thermodynamics section a
Basic of thermodynamics section a
cutting tool materials
cutting tool materials
Workshop practice lab 1
Workshop practice lab 1
Screw Recommendations for Specific Resins and Processes
Screw Recommendations for Specific Resins and Processes
Ähnlich wie lathe
5-Lathe.pdf
5-Lathe.pdf
MITULPATEL225316
7 shpaper planer.pptx
7 shpaper planer.pptx
ssuser72b8e8
7 shpaper planer machining of flat surfaces.pdf
7 shpaper planer machining of flat surfaces.pdf
ssuser0cd0f1
Chapter7b machining turning(1)
Chapter7b machining turning(1)
Noor 'Izzahtul Aisyah
Chapter7b machining turning
Chapter7b machining turning
Noor 'Izzahtul Aisyah
welding 4110.ppt
welding 4110.ppt
ToshiroHitsugaya19
Lathe final.ppt
Lathe final.ppt
ToshiroHitsugaya19
Lathe Machine Metal Cutting
Lathe Machine Metal Cutting
Naman Gandhi
99992012 amu.pdf
99992012 amu.pdf
VivekChawla19
MCE-314-LECTURE-5-MACHINE SHOP.pdf
MCE-314-LECTURE-5-MACHINE SHOP.pdf
THANGARASUA
Theoryofmetalcutting 130628042955-phpapp02
Theoryofmetalcutting 130628042955-phpapp02
manojkumarg1989
Theory of metal cutting
Theory of metal cutting
raajeeradha
Theoryofmetalcutting 130628042955-phpapp02
Theoryofmetalcutting 130628042955-phpapp02
manojkumarg1990
Theoryofmetalcutting 130628042955-phpapp02
Theoryofmetalcutting 130628042955-phpapp02
manojkumarg1990
Casement Type Wind Turbine
Casement Type Wind Turbine
Kaustubh Khandagale
Lathe
Lathe
Manish Singh
Lathe
Lathe
aditya_12
Milling Machine
Milling Machine
Dhyey Shukla
Production Technology, chapter 5.pdf
Production Technology, chapter 5.pdf
MohammedKhodary4
Ch 4 lathe
Ch 4 lathe
Rohit Sahu
Ähnlich wie lathe
(20)
5-Lathe.pdf
5-Lathe.pdf
7 shpaper planer.pptx
7 shpaper planer.pptx
7 shpaper planer machining of flat surfaces.pdf
7 shpaper planer machining of flat surfaces.pdf
Chapter7b machining turning(1)
Chapter7b machining turning(1)
Chapter7b machining turning
Chapter7b machining turning
welding 4110.ppt
welding 4110.ppt
Lathe final.ppt
Lathe final.ppt
Lathe Machine Metal Cutting
Lathe Machine Metal Cutting
99992012 amu.pdf
99992012 amu.pdf
MCE-314-LECTURE-5-MACHINE SHOP.pdf
MCE-314-LECTURE-5-MACHINE SHOP.pdf
Theoryofmetalcutting 130628042955-phpapp02
Theoryofmetalcutting 130628042955-phpapp02
Theory of metal cutting
Theory of metal cutting
Theoryofmetalcutting 130628042955-phpapp02
Theoryofmetalcutting 130628042955-phpapp02
Theoryofmetalcutting 130628042955-phpapp02
Theoryofmetalcutting 130628042955-phpapp02
Casement Type Wind Turbine
Casement Type Wind Turbine
Lathe
Lathe
Lathe
Lathe
Milling Machine
Milling Machine
Production Technology, chapter 5.pdf
Production Technology, chapter 5.pdf
Ch 4 lathe
Ch 4 lathe
Mehr von abubacker siddiq
Quality by design(paula_ruth_ann)
Quality by design(paula_ruth_ann)
abubacker siddiq
Quality design
Quality design
abubacker siddiq
Quality by design(paula_ruth_ann)
Quality by design(paula_ruth_ann)
abubacker siddiq
Quality by design jeri and tami
Quality by design jeri and tami
abubacker siddiq
Quality by design jeri and tami
Quality by design jeri and tami
abubacker siddiq
Qby d presentation-20jun12ppt
Qby d presentation-20jun12ppt
abubacker siddiq
Quality by design jeri and tami
Quality by design jeri and tami
abubacker siddiq
Welding
Welding
abubacker siddiq
Welding
Welding
abubacker siddiq
Simulation
Simulation
abubacker siddiq
Mehr von abubacker siddiq
(10)
Quality by design(paula_ruth_ann)
Quality by design(paula_ruth_ann)
Quality design
Quality design
Quality by design(paula_ruth_ann)
Quality by design(paula_ruth_ann)
Quality by design jeri and tami
Quality by design jeri and tami
Quality by design jeri and tami
Quality by design jeri and tami
Qby d presentation-20jun12ppt
Qby d presentation-20jun12ppt
Quality by design jeri and tami
Quality by design jeri and tami
Welding
Welding
Welding
Welding
Simulation
Simulation
Kürzlich hochgeladen
Food safety_Challenges food safety laboratories_.pdf
Food safety_Challenges food safety laboratories_.pdf
Sherif Taha
ICT role in 21st century education and it's challenges.
ICT role in 21st century education and it's challenges.
MaryamAhmad92
UGC NET Paper 1 Mathematical Reasoning & Aptitude.pdf
UGC NET Paper 1 Mathematical Reasoning & Aptitude.pdf
Nirmal Dwivedi
This PowerPoint helps students to consider the concept of infinity.
This PowerPoint helps students to consider the concept of infinity.
christianmathematics
Salient Features of India constitution especially power and functions
Salient Features of India constitution especially power and functions
KarakKing
The basics of sentences session 3pptx.pptx
The basics of sentences session 3pptx.pptx
heathfieldcps1
Key note speaker Neum_Admir Softic_ENG.pdf
Key note speaker Neum_Admir Softic_ENG.pdf
Admir Softic
On National Teacher Day, meet the 2024-25 Kenan Fellows
On National Teacher Day, meet the 2024-25 Kenan Fellows
Mebane Rash
Introduction to Nonprofit Accounting: The Basics
Introduction to Nonprofit Accounting: The Basics
TechSoup
Kodo Millet PPT made by Ghanshyam bairwa college of Agriculture kumher bhara...
Kodo Millet PPT made by Ghanshyam bairwa college of Agriculture kumher bhara...
pradhanghanshyam7136
Vishram Singh - Textbook of Anatomy Upper Limb and Thorax.. Volume 1 (1).pdf
Vishram Singh - Textbook of Anatomy Upper Limb and Thorax.. Volume 1 (1).pdf
ssuserdda66b
Towards a code of practice for AI in AT.pptx
Towards a code of practice for AI in AT.pptx
Jisc
Making communications land - Are they received and understood as intended? we...
Making communications land - Are they received and understood as intended? we...
Association for Project Management
How to Create and Manage Wizard in Odoo 17
How to Create and Manage Wizard in Odoo 17
Celine George
Explore beautiful and ugly buildings. Mathematics helps us create beautiful d...
Explore beautiful and ugly buildings. Mathematics helps us create beautiful d...
christianmathematics
Sociology 101 Demonstration of Learning Exhibit
Sociology 101 Demonstration of Learning Exhibit
jbellavia9
Spatium Project Simulation student brief
Spatium Project Simulation student brief
Association for Project Management
1029 - Danh muc Sach Giao Khoa 10 . pdf
1029 - Danh muc Sach Giao Khoa 10 . pdf
QucHHunhnh
Unit-IV- Pharma. Marketing Channels.pptx
Unit-IV- Pharma. Marketing Channels.pptx
VishalSingh1417
HMCS Max Bernays Pre-Deployment Brief (May 2024).pptx
HMCS Max Bernays Pre-Deployment Brief (May 2024).pptx
Esquimalt MFRC
Kürzlich hochgeladen
(20)
Food safety_Challenges food safety laboratories_.pdf
Food safety_Challenges food safety laboratories_.pdf
ICT role in 21st century education and it's challenges.
ICT role in 21st century education and it's challenges.
UGC NET Paper 1 Mathematical Reasoning & Aptitude.pdf
UGC NET Paper 1 Mathematical Reasoning & Aptitude.pdf
This PowerPoint helps students to consider the concept of infinity.
This PowerPoint helps students to consider the concept of infinity.
Salient Features of India constitution especially power and functions
Salient Features of India constitution especially power and functions
The basics of sentences session 3pptx.pptx
The basics of sentences session 3pptx.pptx
Key note speaker Neum_Admir Softic_ENG.pdf
Key note speaker Neum_Admir Softic_ENG.pdf
On National Teacher Day, meet the 2024-25 Kenan Fellows
On National Teacher Day, meet the 2024-25 Kenan Fellows
Introduction to Nonprofit Accounting: The Basics
Introduction to Nonprofit Accounting: The Basics
Kodo Millet PPT made by Ghanshyam bairwa college of Agriculture kumher bhara...
Kodo Millet PPT made by Ghanshyam bairwa college of Agriculture kumher bhara...
Vishram Singh - Textbook of Anatomy Upper Limb and Thorax.. Volume 1 (1).pdf
Vishram Singh - Textbook of Anatomy Upper Limb and Thorax.. Volume 1 (1).pdf
Towards a code of practice for AI in AT.pptx
Towards a code of practice for AI in AT.pptx
Making communications land - Are they received and understood as intended? we...
Making communications land - Are they received and understood as intended? we...
How to Create and Manage Wizard in Odoo 17
How to Create and Manage Wizard in Odoo 17
Explore beautiful and ugly buildings. Mathematics helps us create beautiful d...
Explore beautiful and ugly buildings. Mathematics helps us create beautiful d...
Sociology 101 Demonstration of Learning Exhibit
Sociology 101 Demonstration of Learning Exhibit
Spatium Project Simulation student brief
Spatium Project Simulation student brief
1029 - Danh muc Sach Giao Khoa 10 . pdf
1029 - Danh muc Sach Giao Khoa 10 . pdf
Unit-IV- Pharma. Marketing Channels.pptx
Unit-IV- Pharma. Marketing Channels.pptx
HMCS Max Bernays Pre-Deployment Brief (May 2024).pptx
HMCS Max Bernays Pre-Deployment Brief (May 2024).pptx
lathe
1.
©© rkm2003rkm2003 Turning Operations L
a t h e
2.
©© rkm2003rkm2003 Turning Operations •
Machine Tool – LATHE • Job (workpiece) – rotary motion • Tool – linear motions “Mother of Machine Tools “ Cylindrical and flat surfaces
3.
©© rkm2003rkm2003 Some Typical
Lathe Jobs Turning/Drilling/Grooving/ Threading/Knurling/Facing...
4.
©© rkm2003rkm2003 The Lathe
5.
©© rkm2003rkm2003 The Lathe Bed Head
Stock Tail Stock CarriageFeed/Lead Screw
6.
©© rkm2003rkm2003 Types of
Lathes • Engine Lathe • Speed Lathe • Bench Lathe • Tool Room Lathe • Special Purpose Lathe • Gap Bed Lathe …
7.
©© rkm2003rkm2003 Size of
Lathe Workpiece Length Swing
8.
©© rkm2003rkm2003 Size of
Lathe .. Example: 300 - 1500 Lathe • Maximum Diameter of Workpiece that can be machined = SWING (= 300 mm) • Maximum Length of Workpiece that can be held between Centers (=1500 mm)
9.
©© rkm2003rkm2003 Workholding Devices •
Equipment used to hold – Workpiece – fixtures – Tool - jigs Securely HOLD or Support while machining
10.
©© rkm2003rkm2003 Chucks Three jaw
Four Jaw WoWo....
11.
©© rkm2003rkm2003 CentersWoWo....
12.
©© rkm2003rkm2003 FaceplatesWoWo....
13.
©© rkm2003rkm2003 DogsWoWo....
14.
©© rkm2003rkm2003 Mandrels Workpiece (job)
with a hole WoWo....
15.
©© rkm2003rkm2003 RestsWoWo.... Steady Rest
Follower Rest
16.
©© rkm2003rkm2003 Operating/Cutting Conditions 1.
Cutting Speed v 2. Feed f 3. Depth of Cut d
17.
©© rkm2003rkm2003 Operating Conditions NDSspeedperipheral D π π == =rotation1intraveltoolrelative
18.
©© rkm2003rkm2003 Cutting Speed The
Peripheral Speed of Workpiece past the Cutting Tool =Cutting Speed OpOp.... m/min 1000 ND v π = D – Diameter (mm) N – Revolutions per Minute (rpm)
19.
©© rkm2003rkm2003 Feed f –
the distance the tool advances for every rotation of workpiece (mm/rev) OpOp....
20.
©© rkm2003rkm2003 Depth of
Cut perpendicular distance between machined surface and uncut surface of the Workpiece d = (D1 – D2)/2 (mm) OpOp....
21.
©© rkm2003rkm2003 3 Operating
Conditions
22.
©© rkm2003rkm2003 Selection of
.. • Workpiece Material • Tool Material • Tool signature • Surface Finish • Accuracy • Capability of Machine Tool OpOp....
23.
©© rkm2003rkm2003 Material Removal
Rate MRRMRR Volume of material removed in one revolution MRR = π D d f mm3 • Job makes N revolutions/min MRR = π D d f N (mm3 /min) • In terms of v MRR is given by MRR = 1000 v d f (mm3 /min) OpOp....
24.
©© rkm2003rkm2003 MRR dimensional consistency
by substituting the units OpOp.... MRR: D d f N (mm)(mm) (mm/rev)(rev/min) = mm3 /min
25.
©© rkm2003rkm2003 Operations on
Lathe • Turning • Facing • knurling • Grooving • Parting • Chamfering • Taper turning • Drilling • Threading OpOp....
26.
©© rkm2003rkm2003 Turning Cylindrical job OpOp....
27.
©© rkm2003rkm2003 Turning .. Cylindrical
job OpOp....
28.
©© rkm2003rkm2003 Turning .. •
Excess Material is removed to reduce Diameter • Cutting Tool: Turning Tool a depth of cut of 1 mm will reduce diameter by 2 mm OpOp....
29.
©© rkm2003rkm2003 Facing Flat Surface/Reduce
length OpOp....
30.
©© rkm2003rkm2003 Facing .. •
machine end of job Flat surface or to Reduce Length of Job • Turning Tool • Feed: in direction perpendicular to workpiece axis –Length of Tool Travel = radius of workpiece • Depth of Cut: in direction parallel to workpiece axis OpOp....
31.
©© rkm2003rkm2003 Facing ..OpOp....
32.
©© rkm2003rkm2003 Eccentric Turning OpOp....
33.
©© rkm2003rkm2003 Knurling • Produce
rough textured surface – For Decorative and/or Functional Purpose • Knurling Tool A Forming Process MRR~0 OpOp....
34.
©© rkm2003rkm2003 Knurling OpOp....
35.
©© rkm2003rkm2003 Knurling ..OpOp....
36.
©© rkm2003rkm2003 Grooving • Produces
a Groove on workpiece • Shape of tool shape of groove • Carried out using Grooving Tool A form tool • Also called Form Turning OpOp....
37.
©© rkm2003rkm2003 Grooving .. OpOp....
38.
©© rkm2003rkm2003 Parting • Cutting
workpiece into Two • Similar to grooving • Parting Tool • Hogging – tool rides over – at slow feed • Coolant use OpOp....
39.
©© rkm2003rkm2003 Parting ..OpOp....
40.
©© rkm2003rkm2003 ChamferingOpOp....
41.
©© rkm2003rkm2003 Chamfering Beveling
sharp machined edges Similar to form turning Chamfering tool – 45° To • Avoid Sharp Edges • Make Assembly Easier • Improve Aesthetics OpOp....
42.
©© rkm2003rkm2003 Taper Turning •
Taper: OpOp.... L DD 2 tan 21 − =α
43.
©© rkm2003rkm2003 Taper Turning.. MethodsMethods •
Form Tool • Swiveling Compound Rest • Taper Turning Attachment • Simultaneous Longitudinal and Cross Feeds OpOp.... Conicity L DD K 21 − =
44.
©© rkm2003rkm2003 Taper Turning
.. By Form Tool OpOp....
45.
©© rkm2003rkm2003 Taper Turning
,, By Compound Rest OpOp....
46.
©© rkm2003rkm2003 Drilling Drill –
cutting tool – held in TS – feed from TS OpOp....
47.
©© rkm2003rkm2003 Process Sequence •
How to make job from raw material 45 long x 30 dia.? OpOp.... Steps: •Operations •Sequence •Tools •Process
48.
©© rkm2003rkm2003 Process Sequence
.. Possible Sequences • TURNING - FACING - KNURLING • TURNING - KNURLING - FACING • FACING - TURNING - KNURLING • FACING - KNURLING - TURNING • KNURLING - FACING - TURNING • KNURLING - TURNING – FACING What is an Optimal Sequence? OpOp.... X X X X
49.
©© rkm2003rkm2003 Machining Time Turning
Time • Job length Lj mm • Feed f mm/rev • Job speed N rpm • f N mm/min min Nf L t j = OpOp....
50.
©© rkm2003rkm2003 Manufacturing Time Manufacturing
Time = Machining Time + Setup Time + Moving Time + Waiting Time OpOp....
51.
©© rkm2003rkm2003 Example A mild
steel rod having 50 mm diameter and 500 mm length is to be turned on a lathe. Determine the machining time to reduce the rod to 45 mm in one pass when cutting speed is 30 m/min and a feed of 0.7 mm/rev is used.
52.
©© rkm2003rkm2003 Example calculate the
required spindle speed as: N = 191 rpm m/min 1000 ND v π = Given data: D = 50 mm, Lj = 500 mm v = 30 m/min, f = 0.7 mm/rev Substituting the values of v and D in
53.
©© rkm2003rkm2003 Example Can a
machine has speed of 191 rpm? Machining time: min Nf L t j = t = 500 / (0.7×191) = 3.74 minutes
54.
©© rkm2003rkm2003 Example • Determine
the angle at which the compound rest would be swiveled for cutting a taper on a workpiece having a length of 150 mm and outside diameter 80 mm. The smallest diameter on the tapered end of the rod should be 50 mm and the required length of the tapered portion is 80 mm.
55.
©© rkm2003rkm2003 Example • Given
data: D1 = 80 mm, D2 = 50 mm, Lj = 80 mm (with usual notations) tan α = (80-50) / 2×80 • or α = 10.620 • The compound rest should be swiveled at 10.62o
56.
©© rkm2003rkm2003 Example • A
150 mm long 12 mm diameter stainless steel rod is to be reduced in diameter to 10 mm by turning on a lathe in one pass. The spindle rotates at 500 rpm, and the tool is traveling at an axial speed of 200 mm/min. Calculate the cutting speed, material removal rate and the time required for machining the steel rod.
57.
©© rkm2003rkm2003 Example • Given
data: Lj = 150 mm, D1 = 12 mm, D2 = 10 mm, N = 500 rpm • Using Equation (1) • v = π×12×500 / 1000 • = 18.85 m/min. • depth of cut = d = (12 – 10)/2 = 1 mm
58.
©© rkm2003rkm2003 Example • feed
rate = 200 mm/min, we get the feed f in mm/rev by dividing feed rate by spindle rpm. That is • f = 200/500 = 0.4 mm/rev • From Equation (4), • MRR = 3.142×12×0.4×1×500 = 7538.4 mm3/min • from Equation (8), • t = 150/(0.4×500) = 0.75 min.
59.
©© rkm2003rkm2003 Example • Calculate
the time required to machine a workpiece 170 mm long, 60 mm diameter to 165 mm long 50 mm diameter. The workpiece rotates at 440 rpm, feed is 0.3 mm/rev and maximum depth of cut is 2 mm. Assume total approach and overtravel distance as 5 mm for turning operation.
60.
©© rkm2003rkm2003 Example • Given
data: Lj = 170 mm, D1 = 60 mm, D2 = 50 mm, N = 440 rpm, f = 0.3 mm/rev, d= 2 mm, • How to calculate the machining time when there is more than one operation?
61.
©© rkm2003rkm2003 Example • Time
for Turning: • Total length of tool travel = job length + length of approach and overtravel • L = 170 + 5 = 175 mm • Required depth to be cut = (60 – 50)/2 = 5 mm • Since maximum depth of cut is 2 mm, 5 mm cannot be cut in one pass. Therefore, we calculate number of cuts or passes required. • Number of cuts required = 5/2 = 2.5 or 3 (since cuts cannot be a fraction) • Machining time for one cut = L / (f×N) • Total turning time = [L / (f×N)] × Number of cuts • = [175/(0.3×440)] × 3= 3.97 min.
62.
©© rkm2003rkm2003 Example • Time
for facing: • Now, the diameter of the job is reduced to 50 mm. Recall that in case of facing operations, length of tool travel is equal to half the diameter of the job. That is, l = 25 mm. Substituting in equation 8, we get • t = 25/(0.3×440) • = 0.18 min.
63.
©© rkm2003rkm2003 Example • Total
time: • Total time for machining = Time for Turning + Time for Facing • = 3.97 + 0.18 • = 4.15 min. • The reader should find out the total machining time if first facing is done.
64.
©© rkm2003rkm2003 Example • From
a raw material of 100 mm length and 10 mm diameter, a component having length 100 mm and diameter 8 mm is to be produced using a cutting speed of 31.41 m/min and a feed rate of 0.7 mm/revolution. How many times we have to resharpen or regrind, if 1000 work- pieces are to be produced. In the taylor’s expression use constants as n = 1.2 and C = 180
65.
©© rkm2003rkm2003 Example • Given
D =10 mm , N = 1000 rpm, v = 31.41 m/minute • From Taylor’s tool life expression, we have vT n = C • Substituting the values we get, • (31.40)(T)1.2 = 180 • or T = 4.28 min
66.
©© rkm2003rkm2003 Example • Machining
time/piece = L / (f×N) • = 100 / (0.7×1000) • = 0.142 minute. • Machining time for 1000 work-pieces = 1000 × 0.142 = 142.86 min • Number of resharpenings = 142.86/ 4.28 • = 33.37 or 33 resharpenings
67.
©© rkm2003rkm2003 Example • 6:
While turning a carbon steel cylinder bar of length 3 m and diameter 0.2 m at a feed rate of 0.5 mm/revolution with an HSS tool, one of the two available cutting speeds is to be selected. These two cutting speeds are 100 m/min and 57 m/min. The tool life corresponding to the speed of 100 m/min is known to be 16 minutes with n=0.5. The cost of machining time, setup time and unproductive time together is Rs.1/sec. The cost of one tool re-sharpening is Rs.20. • Which of the above two cutting speeds should be selected from the point of view of the total cost of producing this part? Prove your argument.
68.
©© rkm2003rkm2003 Example • Given
T1 = 16 minute, v1 = 100 m/minute, v2 = 57 m/minute, D = 200mm, l = 300 mm, f = 0.5 mm/rev • Consider Speed of 100 m/minute • N1 = (1000 × v) / (π × D) = (1000×100) / (π×200) = 159.2 rpm • t1 = l / (f×N) = 3000 / (0.5 ×159.2) = 37.7 minute • Tool life corresponding to speed of 100 m/minute is 16 minute. • Number of resharpening required = 37.7 / 16 = 2.35 • • or number of resharpenings = 2
69.
©© rkm2003rkm2003 Example • Total
cost = • Machining cost + Cost of resharpening × Number of resharpening • = 37.7×60×1+ 20×2 • = Rs.2302
70.
©© rkm2003rkm2003 Example • Consider
Speed of 57 m/minute • Using Taylor’s expression T2 = T1 × (v1 / v2)2 with usual notations • = 16 × (100/57)2 = 49 minute • Repeating the same procedure we get t2 = 66 minute, number of reshparpening=1 and total cost = Rs. 3980. • • The cost is less when speed = 100 m/minute. Hence, select 100 m/minute.
71.
©© rkm2003rkm2003 Example • Write
the process sequence to be used for manufacturing the component from raw material of 175 mm length and 60 mm diameter
72.
©© rkm2003rkm2003 Example
73.
©© rkm2003rkm2003 Example • To
write the process sequence, first list the operations to be performed. The raw material is having size of 175 mm length and 60 mm diameter. The component shown in Figure 5.23 is having major diameter of 50 mm, step diameter of 40 mm, groove of 20 mm and threading for a length of 50 mm. The total length of job is 160 mm. Hence, the list of operations to be carried out on the job are turning, facing, thread cutting, grooving and step turning
74.
©© rkm2003rkm2003 Example • A
possible sequence for producing the component would be: • Turning (reducing completely to 50 mm) • Facing (to reduce the length to 160 mm) • Step turning (reducing from 50 mm to 40 mm) • Thread cutting. • Grooving
Jetzt herunterladen